LG TV (LCD, 47'') working but making a Chirping noise.

I've been using a TV as my computer monitor for years. (LG LCD 47''). Recently, I noticed that while I'm playing a game, the TV sometimes makes a high pitched noise, like a cricket or a chirping noise. I only hear it while I'm actually playing a game. If I pause it and browse the option menu, it stops. Similarly, it's louder or fainter depending on what I'm ''looking at'' in the game. I didn't notice a distinct pattern.I googled this but I only found situations where the TV wasn't working anymore. Mine is working perfectly fine, except for the noise.Thanks for the help, let me know what else I can find out.

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All Answers

That is, a common noise source in TVs and many other things is the common -> coil <-. And your old electronics tech has a bottle of spray shellac handy to quiet such a part if they don't want to replace it. Here's an article about this.